gitignore: Filter *.pc

Change-Id: I1e4e9b7342b23b4ef460801d61b4dd9c2fdc6dab
diff --git a/.gitignore b/.gitignore
index 7633c73..11a3bfb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@
 *.pyc
 *.gcda
 *.gcno
+*.pc
 
 #configure
 aclocal.m4